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CrashStats

AL10 road accidents: crash map and statistics

Police recorded 4,027 road traffic collisions in the AL10 postcode district, Welwyn Hatfield, from 1979 to 2025, and 5,420 people were killed or injured in them. Of those collisions, 43 were fatal and 696 were serious.

In 2025 police recorded 40 collisions, down 18% on 2024 (49).

Collisions since 1979
4,027
878th highest of 2,813 postcode districts
Casualties
5,420
1.35 per collision
Fatal collisions
43
44 people killed
Serious collisions
696
790 seriously injured
Collisions in 2025
40
Down 18% on 2024
Casualties in 2025
50
Down 11% on 2024

Road collision statistics for AL10

Collisions by severity, 1979 to 2025

  • Fatal431.1%
  • Serious69617%
  • Slight3,28882%

What the data shows

  • AL10 had 541 collisions from 2016 to 2025, 33% fewer than the 809 from 2006 to 2015.
  • 18% of collisions in AL10 were fatal or serious, against 20% across Great Britain.
  • 598 children under 16 were killed or injured in AL10, 11% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 38% of collisions in AL10.

Where AL10 ranks among 2,813 postcode districts

Most collisions
878th
Most casualties
861st
Most fatal collisions
1,403rd
Most serious collisions
956th

Collisions by day of the week

  • Monday572 (14%)
  • Tuesday626 (16%)
  • Wednesday602 (15%)
  • Thursday643 (16%)
  • Friday699 (17%)
  • Saturday500 (12%)
  • Sunday385 (9.6%)

Light conditions

  • Daylight2,853 (71%)
  • Dark, street lights lit1,001 (25%)
  • Dark, no street lighting99 (2.5%)
  • Dark, street lights unlit39 (1%)
  • Dark, lighting unknown35 (0.9%)

Type of road

  • Single carriageway2,468 (61%)
  • Roundabout790 (20%)
  • Dual carriageway627 (16%)
  • One way street or slip road124 (3.1%)
  • Not recorded18 (0.4%)

Speed limit at the scene

  • 20 mph17 (0.4%)
  • 30 mph2,446 (61%)
  • 40 mph177 (4.4%)
  • 50 mph430 (11%)
  • 60 mph620 (15%)
  • 70 mph337 (8.4%)

Weather at the time

  • Fine, no high winds3,144 (78%)
  • Raining, no high winds581 (14%)
  • Raining with high winds61 (1.5%)
  • Fine with high winds43 (1.1%)
  • Fog or mist29 (0.7%)
  • Snowing, no high winds24 (0.6%)
  • Snowing with high winds5 (0.1%)
  • Other81 (2%)
  • Not recorded59 (1.5%)

Who was hurt

  • Car occupant3,298 (61%)
  • Cyclist632 (12%)
  • Motorcyclist624 (12%)
  • Pedestrian540 (10%)
  • Van occupant112 (2.1%)
  • Bus or coach occupant99 (1.8%)
  • Taxi or private hire car occupant47 (0.9%)
  • Goods vehicle occupant (over 3.5 tonnes)33 (0.6%)
  • Minibus occupant16 (0.3%)
  • Other vehicle occupant7 (0.1%)
  • Other8 (0.1%)
  • Not recorded4 (0.1%)

Source: Department for Transport, STATS19 road safety data

AL10 road accidents by year

Collisions and casualties in AL10, 1979 to 2025

Collisions in AL10 peaked at 125 in 2004; 2025 had 40.

  • Collisions
  • Collisions in 2025: 40
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20254050
20244956
20234961
20224563
20214967
20202936
201975106
20186282
20176593
201678108
201586106
201487112
20136790
201279108
20117499
20106898
200974105
200895121
200791126
200688134
200590116
2004125181
2003106152
2002119160
2001100130
2000108154
199998133
1998116191
1997117147
199697144
199593146
199488110
199386120
199283138
19916797
199092109
198990110
198886119
198775104
1986123148
198598133
198495106
198398111
1982108139
1981101130
1980104128
1979114143

Map of recent crashes in AL10

Map of the 24 most recent crashes in AL10

Use the arrow keys to move the map and the plus and minus keys to zoom.

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in AL10

The 24 most recent collisions in AL10 happened between 25 May and 22 December 2025.

Severity

Crashes by road in AL10

The A1001 has the most collisions in AL10, 675 of 4,027 (17%), followed by the B6426 (403).

Collisions in AL10 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA100167597712104
2ndB6426403509261
3rdA1057261342249
4thA1(M)241374531
5thA1228317341
6thA1000186267837
7thB197180226125
8thA414385014

Council areas covering AL10

Collisions in AL10 were recorded in 2 council areas. Welwyn Hatfield has 4,019 of 4,027 (99.8%).

Collisions in AL10 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stWelwyn Hatfield4,0195,40743696
2ndSt Albans5600

Towns in AL10

Collisions in AL10 were recorded in 2 towns, led by Hatfield (2,766) and Welham Green (3).